Ingeniería Civil y Mecánica

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Subject: search.filters.subject.FLUIDO DE TRABAJO

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    Modelación de tubos de calor tipo sifón mediante el uso de un software computacional para disipar calor en el procesador de una computadora de escritorio
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-09) Salazar Esquivel, Leonel Stalin; Escobar Luna, Luis Eduardo
    His first studies of heat pipes began in 1944, his first applications were in satellites with the aim of maintaining a uniform and distributed temperature throughout the structure, then he focused more on the branch of electronics. The investigations were carried out in heat pipes that are elements of great thermal conductivity, their structure is completely closed, they state; of an evaporator, an adiabatic section and a condenser section were used; various working fluids, distilled water having a range of 30 to 200 degrees centigrade, ammonia -60 to 100 degrees centigrade, sodium 600 to 1200 degrees centigrade, mercury 250 to 650 degrees centigrade, methanol 10 to 104 degrees centigrade. Round copper, aluminum and stainless-steel heat pipes were used that are designed between 0.6 x 0.6 mm in their cross section and their length can vary between 25 and 100 mm according to their use, inside they are formed without a wick or with an enveloping fine mesh wick, sintered powder metal, axial groove and among others. The operation was applied to the evaporator that leads through the wick and the tube that vaporizes the working fluid, the pressure of the vapor is driven towards the condenser where the vapor is condensed, the capillary pressure created in the wick pumps the condensed liquid towards behind this process is continuous as long as there is capillary pressure.
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    Análisis de la geometría y del rendimiento de una turbina de flujo radial para el estudio de fluidos de trabajo en un ciclo orgánico Rankine usando distintos recursos renovables de baja entalpía (Solar-Biomasa-Geotérmica)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2018) Almache Jiménez, Alex Andrés; Moya Pinta, Diego Armando
    The present experimental project is focused on studying the renewable resources available in the province of Tungurahua (solar-biomass-geothermal). The project is based on determining the characteristics of each renewable resource for using within a Rankine Organic Cycle. In order to take advantage of its energy potential for micro generation, by using a radial flow turbine. And the use of computer tools, such as the ANSYS Software Academic and the EES Software Academic, with the purpose of simplifying the analysis and obtaining reliable results. First, the Rankine Organic Cycle analysis was performed using different configurations in the cycle. For instance, the use of a single renewable resource, such as heat source inside of evaporator. In addition to this, it was carried out the hybridization of renewable resources, by using one and two heat sources to preheat the working fluid before arriving to the evaporator in order to increase the thermal performance of the cycle and its power. The thermal power for being used as a heat source was determined by taking advantage of the daily global irradiation on the surface of the Tungurahua province for the solar resource. In the case of the biomass resource, the quantity of biomass resource transformed to biogas was determined, through the treatment of sludge available in the wastewater treatment plant of Ambato city, located in the Las Viñas place. Finally, for the geothermal resource the use of geothermal water available in the thermal sources of the "Virgin" in Baños de Agua Santa city was determined. In the thermodynamic study of the cycle, three different working fluids, determined by the temperature of the renewable resource were used. Likewise, the mass flow of these was calculated for each configuration of the cycle in order to obtain data such as pressures, enthalpies and temperatures at each point of the cycle. It is worth mentioning that the EES software Academic was used for this analysis, since it has a large base of thermo-physical properties of different working fluids. Moreover, different geometries of radial turbines were analyzed. These geometries were sized and designed using tools available in the ANSYS software Academic. Also, this software allowed us to perform the analysis of different working fluids in each geometry by simulating them. Obtaining results such as the power of the turbine; pressures, temperatures and kinetic energy of turbulence in the blade of the turbine.